I imagine that this postcard dates before 1910. The young lady was called Juliette Caron, she was born in 1882 and was the only lady carpenter in France. She was working on the barracks at Montluçon when this picture was taken. The back of the postcard tells us more;
"The lady carpenter works these days at the machine depot. Dad has seen her.. she works well they say. She works hard and doesn't mind people watching her"